Download Ubuntu Server for ARM with support for the very latest ARM-based server systems powered by certified 64-bit processors. Get Ubuntu Server Option 1: Instant Ubuntu VMs. Try Multipass, a mini cloud on Mac, Windows and Linux. Always up-to-date with security fixes; Cloud-init metadata for cloud dev and test. Install docker on Ubuntu operating system with easy steps. Use the following command to install docker application in Ubuntu distro. This guide will show you how to install and use Docker on Ubuntu 16.04. These instructions are taken directly from the official Docker for Ubuntu page, but I wanted to reiterate. On Ubuntu 16.04 using systemd, the docker.
Docker is a great tool for automating the deployment of Linux applications inside software containers, but to take full advantage of its potential each component of an application should run in its own individual container. For complex applications with a lot of components, orchestrating all the containers to start up, communicate, and shut down together can quickly become unwieldy.
The Docker community came up with a popular solution called Fig, which allowed you to use a single YAML file to orchestrate all your Docker containers and configurations. This became so popular that the Docker team decided to make Docker Compose based on the Fig source, which is now deprecated. Docker Compose makes it easier for users to orchestrate the processes of Docker containers, including starting up, shutting down, and setting up intra-container linking and volumes.
In this tutorial, we’ll show you how to install the latest version of Docker Compose to help you manage multi-container applications.
To follow this article, you will need an Ubuntu 18.04 server with the following:
- A non-root user with sudo privileges (Initial Server Setup with Ubuntu 18.04 explains how to set this up.)
- Docker installed with the instructions from Step 1 and Step 2 of How To Install and Use Docker on Ubuntu 18.04
Once these are in place, you’re ready to follow along.
Note: Even though the Prerequisites give instructions for installing Docker on Ubuntu 18.04, the
docker commands in this article should work on other operating systems as long as Docker is installed.
Step 1 — Installing Docker Compose
Although we can install Docker Compose from the official Ubuntu repositories, it is several minor version behind the latest release, so we’ll install Docker Compose from the Docker’s GitHub repository. The command below is slightly different than the one you’ll find on the Releases page. By using the
-o flag to specify the output file first rather than redirecting the output, this syntax avoids running into a permission denied error caused when using
We’ll check the current release and if necessary, update it in the command below:
Next we’ll set the permissions:
Then we’ll verify that the installation was successful by checking the version:
This will print out the version we installed:
Now that we have Docker Compose installed, we’re ready to run a “Hello World” example.
Step 2 — Running a Container with Docker Compose
The public Docker registry, Docker Hub, includes a Hello World image for demonstration and testing. It illustrates the minimal configuration required to run a container using Docker Compose: a YAML file that calls a single image:
First, we’ll create a directory for the YAML file and move into it:
Then, we’ll create the YAML file:
Put the following contents into the file, save the file, and exit the text editor:
The first line in the YAML file is used as part of the container name. The second line specifies which image to use to create the container. When we run the command
docker-compose up it will look for a local image by the name we specified,
hello-world. With this in place, we’ll save and exit the file.
We can look manually at images on our system with the
docker images command:
When there are no local images at all, only the column headings display:
Now, while still in the
~/hello-world directory, we’ll execute the following command:
The first time we run the command, if there’s no local image named
hello-world, Docker Compose will pull it from the Docker Hub public repository:
After pulling the image,
docker-compose creates a container, attaches, and runs the hello program, which in turn confirms that the installation appears to be working:
Then it prints an explanation of what it did:
Docker containers only run as long as the command is active, so once
hello finished running, the container stopped. Consequently, when we look at active processes, the column headers will appear, but the
hello-world container won’t be listed because it’s not running.
We can see the container information, which we’ll need in the next step, by using the
-a flag which shows all containers, not just the active ones:
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This displays the information we’ll need to remove the container when we’re done with it.
Step 3 — Removing the Image (Optional)
To avoid using unnecessary disk space, we’ll remove the local image. To do so, we’ll need to delete all the containers that reference the image using the
docker rm command, followed by either the CONTAINER ID or the NAME. Below, we’re using the CONTAINER ID from the
docker ps -a command we just ran. Be sure to substitute the ID of your container:
Once all containers that reference the image have been removed, we can remove the image:
We’ve now installed Docker Compose, tested our installation by running a Hello World example, and removed the test image and container.
While the Hello World example confirmed our installation, the simple configuration does not show one of the main benefits of Docker Compose — being able to bring a group of Docker containers up and down all at the same time. To see the power of Docker Compose in action, you might like to check out this practical example, How To Configure a Continuous Integration Testing Environment with Docker and Docker Compose on Ubuntu 16.04(note: this article is for Ubuntu 16.04 rather than 18.04)
Docker is container-based application framework, which wraps a specific application with all its dependencies in a container. Docker containers can easily to ship to the remote location on start there without making entire application setup. This tutorial will help you to install Docker on Ubuntu 19.10, 18.04 LTS, and 16.04 LTS systems.
The very first step is to remove any default Docker packages from the system before installation Docker on a Linux VPS. Execute commands to remove unnecessary Docker versions.
Now install some required packages on your system for installing Docker on Ubuntu system. Run the below commands to do this:
2. Setup Docker Repository
Now import dockers official GPG key to verify packages signature before installing them with apt-get. Run the below command on terminal.
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After that add the Docker repository on your Ubuntu system which contains Docker packages including its dependencies. You must have to enable this repository to install Docker on Ubuntu.
3. Install Docker on Ubuntu
Your system is now ready for Docker installation. Run the following commands to upgrade apt index and then install Docker community edition on Ubuntu.
After successful installation of Docker community edition, the service will start automatically, Use below command to verify service status.
Your system is now ready for running Docker containers. Use our Docker Tutorial for Beginners to working with Docker.
4. How to Use Docker
After installation of Docker on a Linux. Here are some basic details for search and download Docker images, launch containers and manage them.
Search Docker Images
First of all search Docker container images from Docker hub. For example, below command will search all images with Ubuntu and list as output.
Download Docker Images
Now download the Docker container with name Ubuntu on your local system using following commands.
Now make sure that above images have been downloaded successfully on your system. Below command list all images.
Launch New Container with Image
Finally, launch a Docker container using an above-downloaded image on your system. Below command will start a new container and provide you access to that container with /bin/bash shell.
To exit from docker container type
After exiting from Docker container, execute below command to list all running containers.
By default Above command will list only running containers. To list all containers (including stopped container) use following command.
You can start, stop or attach to any containers with following commands. To start container use following command.
To stop container use following command.
To attach to currently running container use following command.